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F. F. SIMPSON. I

FOLDING BED.

- APPLICATION FILED DEC-9, l9l8 1 Patented July 29, 1919.

3 SHEETS-SHEET I.

F. F. SIMPSON.

moms BED. APPLICATION FILED DEC-9. 19H!- 1,3 1 1 ,71 9. Patented July 29, 1919.

3 SHEETS-SHEET 2.

ma COLUMBIA rumoouvn'co wunmdm. n.'c.

F. F. SIMPSON.

V FOLDING BED. 1,311,719.

APPLICATION FILED DEC-BIIQIB,

Patented-July 29, 1919.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

. FRANK r. snvrrson, on THE UNITED ST TES ARMY.

' g FOLDING BED.

To all whom it may concern:

- i v 1 Be it known thatI FRANK F. SnursoN,

Lieut. Colonel, U. S; Army, a citizen of the United States, residing at city of Washington, in the District of Columbia, have invented certain new: and useful Improvements in Folding Beds, of which the following is a. description, reference being had to the accompanying drawing and to the figures of reference marked thereon.

My invention relates to new and useful im rovements in folding beds.

n object of the invention is to provide a folding bed in which the usual link connectionbetween thespring frame and head and foot may be tightly clamped and drawn 1 upwardly to prevent any movement of the links, especially the objectionable rocking movement, so as to form a very rigid bed and at the same time provide means whereby the bed may be readily folded.

Another object of the invention is to provide a simple, cheap and effective locking means of this character which may be readily applied to the ordinary bed now in use and having certain details of structure and op eration hereinafter more fully described.

In the accompanying drawings: Figure 1 is a perspective view of the orchnary army bed now in use, showing my improved link locking means applied thereto;

, f Fig. 2 is an enlarged vertical sectional view showing the locking means in dotted lines in its released position;

Fig. 3 is a longitudinal sectional view taken at right angles to Fig. 2, and showing thelocking means in its locked position;

Fig. 4 is an enlarged perspective view of the locking means detached from the spring frame and showing the cam detached from the hook;

Fig. 5 is a perspective view of a slightly 1 modified form of locking hook;

Fig. 6 is a vertical longitudinal sectional view showing my invention applied to a bed in which a highfoot and head is provided causing the use of a longer link to fold the head and foot under thespring frame;

Fig. 7 is an end view partly in section looking ina direction at right angles to Fig.6; q

Fig. 8 is an end view partly insection, similar to Fig. 7, showing a modified form of locking link and cam.

Referring now to the drawings, 1 repre- Specification of Letters Patent. Patented July 29, 1919,

Application filed December 9, 1918. Serial No. 265,921.

sents the'spring frame of an ordinary army cot or bed which is connected to the head 2 and foot 3 by means of the links 4 and 5. As shown, these links are arranged on each side of the spring frame and one is a long link and the other a short one, so that the head and .foot may fold rearwardly and forwardly, respectively, under the spring frame. This structureof folding cot or bed is well known, but in such a structure, while the cot is firmly held in its set up position, the spring frame is not rigidly supported and has an objectionable movement due to the loose pivotal connections thereof. This movement or wabbling'of the spring frame is objectionable, and, by attaching my improved hook and cam lock, it has been found that a very rigid cot or bed is produced, and which I will now describe.

The links 4: and 5 have their upper ends pivotally connected at 6 and 7 to the inner face of the vertical leg 8 of the angle iron 9, forming the side rail of the spring frame, and their lower ends pivotally connected at 10 and 11 to the outer face of the corner posts 12 of the foot and head of the bed. Pivotally connected to the end rails 13 of the spring frame, at 14, is a hook 15 adapted to have its hooked end 16 passed under the lower edge 17 of the upper link 1. The lower end of the hook has pivoted thereto, by the pivot 18, the cam member 19. The said cam member has a cam face 20 and an upwardly extending lug 21 at one side of the pivot 18, as clearly shown in the drawings. The cam or eccentric pivoted on the hook forces the links upwardly, clamping them tightly against the end of the frame, holding the springs in close contact with the links at the head or foot of the bed, and tightens the links on their pivots, while the hook, which forms a tight connection between the link and end rail, absolutely prevents any movement of the links, and, therefore, prevents any movement of the spring. frame. The lug 21, carried by the cam, prevents the earn from being swung over too far, and also prevents the link from jumping off of the hook.

In the modification shown in Figs. 6 and 7 of. the drawings and showing my invention as applied to a bed having a high foot and head, it is necessary to have a longer link in order that the foot and head may fold all the way under the spring frame. In such a bed the link 22 is pivotally connected to the head or foot and the spring frame in the same manner as described respect to the cot. The lower link 23 is piv ed at 24 to the head of tliebed aiid its outei end is provided with a lug 25 extending at an angle thereto and extending into a notch 26iitthe lower dge at the l nk 22 and PKtWQl the inwardmovement of "the" lower'end of the head.

The vertical leg of the end rail of the spring frame has pivoted 'at27 the downwardly extending: hook 28, which has a notch 28 adapted to receive and hook' over the lower edge of the link 23." Carried by the pivot 27 is a cam 29*whioh has a cam face30, so arranged that when the lower end thereof is swung'downwardly,vit' en'- gages the upper edge of the upper link 22, and by the hook engaging the lowenv edge of the lower link, the tWOlillkS are tightly drawn togetheigxso that therecan-not' possibly be anymovement of thelinks. This locking of the links against movement locks thespring fram'eagainst the same movements and a very rigidb'ed isformed and one which may be readily folded in the same manner as the cot. 1 Y- In the modified form: of locking means shown in Fig. 8,'tlie cam lever 32 ispivoted at 33,50 that the cane face'will engage the upper edge of the link 22' the'sam'e" as shownqin Fig. 7, but, instead of having the hook. 34 mounted on the pivot 33, it is mounted upon tlie pivot 35, carried by the cam lever. By this arrangement, it will be seen that when the cant lever is swung downwardly, the camof'ace engages'the upper edge of the link22 and th'eh'ook draws up onthe link 23'a'ndfirinly locks'them toether. v i 'It will be understoodthat instead of arranging thelinks and clamps so that the latter clamp the links against the end of the f'rame, the links'and clamps maybe so arranged that the clamping action will take place again st the sidesof the frame; Having thus described my invention, what I claim as new and desire tosec'uie by Letters Patent, is: f 1. A folding bed including abed spring frame, head and foot sections, "links" for swingingly connecting" said sections; r'esp'e'c-- tively tothe bed spring frame and limiting the movement of said i sections when in normal position forsu'ppo-iting the frame, hooks carried bythe'bed' springframe, and "caniscooperating with the hooks adapted to causejan upward i)res'su"'re "of the links, 7

whereby said'seotions are rigidly connected frame when in supporting position. 2. A folding bed including a bed spring frame, liead ari'd 'f'oot sections, links for swingingly connecting said sections repectively to the bed spring frame and limiting the movement of'said sections when in normal sositi'on for supporting the frame, hooks carrled ibyithe bed spring frame and extend ing under the links, and cams carried by the lower end of -the hooks and adapted to engage the'lower edgesof the links and cause an" upward pressure "on the links, whereby said sections are rigidlyconnected tosaid cam carried'by the spring frame andengag- 5 ing theupper edgeof the upper link and clamping the two links in the hook 4;. The combination with a bed spring frame, head and foot, of a linkpivotally connectingthe frame'to the head, "a' second i link pivoted to th'ehead and having its free end" entering a-notch in'the lower edge of the first mentioned'link,a"l1ookpivoted to the end of the springffralile at right angles to the link "andengaging' the lower edge of the lower link,and"a cam carried-by the spring frame and engaging the'upperedge f the upper "link clamping 'thej two links in the hook.

- 5. The combination with a bed spring frame, headandfo'ot, link pivotally connecting the'frame to, the head, "a second link pivoted to head and having its'free end entering a notc'liin the lowelj edge] of the first mentioned link, camcarried by i the frame and Q'adaptedtoengage the uppere'dge of the upper'link, and""a"hook pivoted to th e cam andengaging the lower edges-r the lower link when the ca isswung downwardly and drawing the we links tose he j Tn testimony whereof, I signature in the e ese i 'eef tw fvit j s l SIMB ON- WitnesseS: Q

CIL; S'rnnTEvANT,

GLBLYVRIGirrL' Copies of this patent may be vobtained. for five cents "each, by addressing the commissioner' of Patents; 1 wamn tomnt. 

